qemuProcessStop: Remove image metadata only when allowed

In v5.9.0-370-g8fa0374c I've tried to fix a bug by removing
some stale XATTRs in qemuProcessStop(). However, I forgot to
do nothing when the VIR_QEMU_PROCESS_STOP_NO_RELABEL flag was
specified.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>

src/qemu/qemu_process.c

@@ -7648,6 +7648,7 @@ void qemuProcessStop(virQEMUDriverPtr driver,
     /* Do this explicitly after vm->pid is reset so that security drivers don't
      * try to enter the domain's namespace which is non-existent by now as qemu
      * is no longer running. */
+    if (!(flags & VIR_QEMU_PROCESS_STOP_NO_RELABEL)) {
         for (i = 0; i < def->ndisks; i++) {
             virDomainDiskDefPtr disk = def->disks[i];
 
@@ -7656,6 +7657,7 @@ void qemuProcessStop(virQEMUDriverPtr driver,
 
             qemuBlockRemoveImageMetadata(driver, vm, disk->dst, disk->src);
         }
+    }
 
     /* clear all private data entries which are no longer needed */
     qemuDomainObjPrivateDataClear(priv);